Improvement in devices for attaching lamp-burners to lamps



7126} JEALXANERfS f improvement; in attacking LAMPBURNERSm TO 'LAMPS-PATENTED NOV 261867 UNITED STATES PATENT OFFICE.

JOSEPH BELL ALEXANDER, or wAsHmeron, DISTRICT OF COLUMBIA.

IMPROVEMENT IN DEVICES FOR ATTACHING LAMP-BURNERS T0 LAMPS.

Specification forming part of Letters Patent No. 71,261, dated November26, 1867.

7 part of this specification.

The nature of my invention consists in providin g that part of theburner which ordinarily screws into the collar of the fountain with twoor more projections, which easily pass through corresponding notches inthe collar, when the burner, by a short turn, may be safely and firmlyattached.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

I make a burner in any of the known forms, except that part which isusually screwed into theveollar attached to the fountain, which I makesmooth and without a thread, as seen at M, Figure 6, and which will passeasily into and nicely fit in the neck or throat of the collar D, Figs.1, 3, and 5, which throat I also make smooth and without a screw-thread.Upon the sides of the part M, as seen in Fig. 6, I make, by attaching,stamping with die, or otherwise,two or more projections, H and. H; or Icut or stamp out a plate with the projections H and H on it, as seen inFig. 4. This plate has two or more holes, 0 and 0, made through it, bywhich it is attached by rivets to the bottom of the part M; or it may beattached by solder or otherwise. (See Fig. 2.) Through the top rim orchine of the collar D I make two or more notches, Land L, Fig. 3, whichcorrespond with the projections H and H, Figs. 1, 2, 4, and 6, and whichnotches extend entirely through the throat-piece of the collar D, asseen at L and L, Fig. 5. This throat-piece I and 1, being, by thenotches L and L, divided into two or more parts, I shape the lower edgeof each. part into an inclined plane, with the downward projections Kand K at the deepest end of each, as seen in Fig. 5, to prevent anypossibility of the projections H and H passing too far when the burneris turned to fasten it in place.

Having described the manner in which the parts are shaped, I will nowdescribe their operation anduse. The part M of the burner is placeddownward upon the rim N of the collar D, and slightly turned until theprojections H and H drop through the notches L and L, when it is pushedhome and partly turned or twisted by the hand. The projections H and H,leaving the notches L and L, will pass upon the inclined planes I and Iuntil the burner is firmly attached to the collar- D and to thefountain, as seen in Fig. 1.

Similar letters of reference denote like parts in the several figures. I

Fig. 1 represents a vertical section of the burner A, collar D, andfountain E united. Fig. 2 represents, in perspective, an isometricalview of the .lower face of the burner A with the plate B attached. Fig.3 represents, in perspective, an isometrical view of the upper face ofthe collar D. Fig. 4represents, in perspective, a view of the plate Bbefore attachment to the burner A. Fig. 5 represents, in perspective, asectional view of the collar D, showing the throat-piece with itsnotches L and L, the inclined planes I and I, and the downwardprojections. or stops K and K. Fig. 6 represents, in perspective, a viewof the lower part of a lamp-burner, M, with the projections H and H asstruck up with a die or otherwise made.

The advantages of this device are obvious. Its quickness of action, itssimplicity, its certainty, its durability, and safety are recognized ata glance. The common device for attaching burners to lamp-fountains(that of the screw) is tedious, troublesome, uncertain,

easily injured and rendered useless, very undurable, and positivelydangerous.

My improved device will be easier and cheaper to manufacture than themale and female screw-thread which is now out upon the burner andcollar, and which is the most costly and time-consuming process whichattends the manufacture of lamp-burners now in use.

I am aware that this device, as a principle, is not new, as it is usedin attaching musketbayonets, the lids of fruit-cans, and in some ,tionwith the burner A, and the notches L and L, and the inclined planesI andI and the projections K and'K", in combination with the collar D, ortheir equivalent, substantially as described; and for the purpose setforth.

J. B. ALEXANDER.

other applications; but I do not know or believe it has ever been beforeapplied to the attaching of lamp-burners to lamp-fountains.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The application of the device for attaching lamp-burners tolamp-fountains as de- Witnesses: scribed and set forth. EDM. F. BROWN,

2. The projections H and H, in combina- O. BESTOR.

